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I have a library that take a Rack::Request and do stuff on it.
I would like to test it from an unit test and not from a functional test. So I have to create a Rack::Request instance on my own, how can I do it?
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We can run all of our tests at once by using the bin/rails test command. Or we can run a single test file by passing the bin/rails test command the filename containing the test cases. This will run all test methods from the test case.
Most methods can be tested by saying, “When I pass in argument X, I expect return value Y.” This one isn't so straightforward though. This is more like “When the user sees output X and then enters value V, expect subsequent output O.” Instead of accepting arguments, this method gets its value from user input.
Rack testing is a process that tests a construction sealant on specific performance aspects including: Weathering while under compression.
The currently accepted way to test rails controllers is by sending http requests to your application and writing assertions about the response. Rails has ActionDispatch::IntegrationTest which provides integration tests for Minitest which is the Ruby standard library testing framework.
Rack itself includes some unit tests for Rack::Request, you can use them as a starting point (example).
Rack::Request.new(Rack::MockRequest.env_for("http://example.com:8080/", {"REMOTE_ADDR" => "10.10.10.10"}))
Use Rack::MockRequest which is implemented for this purpose. See these tests for example usage.
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